Wiktionary
a. Of or pertaining to something which burns more slowly than comparable objects.
Usage examples of "slow-burning".
A common type, devised by the DL people, was made from slow-burning tree resins, DL 78.
Unable to decide the nature of the object, and having neither torch nor candle, he tore a strip from the hem of his hempen burnoose, and lit the slow-burning cloth and held it aloft at arm's length before him.
She had let her impatience with fools and that old slow-burning anger at Da's death get the better of her.
The only way Discovery could sustain a six-year mission to Titan was by closing as many of its mass loops as possible, to support the slow-burning human metabolisms it shielded, to clean up and feed back waste products.
As he lay back, he felt the aching tiredness flood out of his bones and into the surrounding flesh, spreading out in every direction like a slow-burning fire until his body was suffused with a dull, prickly pain that penetrated every fibre.